Engine.



A. v'. RASMUSSEN.

ENGINE.

APPLICATION FILED NOV. I8l i915.

1,243,554. Patented Oct. 16,1917.

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A. v. RASMUSSEN.

ENGINE.

APPLICATION FILED NOV. IBVIQIE.

'Patented ont. 16,1917,

2 SHEETS-SHEET 2 Y ('Jrwznloz i VRaamuaa en rn anion AXEL V.RASIVIUSSEN, yOIE' DETROIT, MICHIGAN.

ENGINE.

Specicaton o f Letters Patent.

Patented Get. 16, 1917.

Application led NovemberlS, 1916. Serial No. 132,030.

To all wiwi/i t 'may conca/rn.' 4

Be it knownthat I, AXEL V. 'Rasamssnm a subject of the King of Denmark,residing at Detroit, in the county of `Wayne and State of Michigan, haveinvented certain new and useful Improvements in Engines; and I do herebydeclare the following to be a full, clear, and exact 4description of theinvention, such as will enable others skilled in the art to and use thesame.

This invention relates to improvements in engines of the` reciprocatingpiston type, and `has for its primary object to provide an improvedmeans for transmitting the movement of the piston to the engine shaftand for converting the reciprocatory movement of the piston into arotary movement with the least possible amount of friction.

With this and other objects in view, the invention consists in the novelconstruction, combination and arrangement of parts as will behereinafter specifically described, claimed and illustrated in theaccompanying drawings, in which:

Figure 1 represents a longitudinal sectional view through the engine,

Fig. 2 represents a transverse sectional view therethrough, and

Fig. 3 represents a transverse sectional view on the line 3 3 of Fig. 1.

Referring to the drawings in detail, wherein similar reference numeralsdesignate corresponding parts throughout the several views, the numeral5 indicates a base supporting a cylinder 6, havingthe outer jacket 7providing a water chamber 8 communicating with the inletand outlet ports9, whereby water is circulated about the cylinder during the operationof the engine. The heads 10 of the cylindersare provided with apertures11 receiving preferred types of spark plugs 12, and are also providedwith eccentrically.disposed tubular extensions 13, which are alined witheach other and communicate with the cylinders.

rlhe piston la is reciprocably mounted within the cylinder and is formedwith a diametrical recess 15, the endV walls of which are connected witha centrally located bar or web 16.

An enlargement 17 which constitutes a housing, which will hereinafter bemore fullydescribed, formed centrally of a tubuwhich it appertains tomake 2O are positioned in grooves lar member 18, is movably positionedin the recess 15 and the tubular members 18 which project oppositelytherefrom extend through openings 19 formed in thepiston and into thetubular extensions 13 of the cylinder! heads. The tubular member 18 isdisposed eccentric to the axis of the piston 14, and filling within theeccentric eXtensions 13 prevents rotary movement 'of the piston withinthe cylinder.l Packing rings formed in the tubular members 1S and engagethe walls of the openings 19 to prevent leakage of the motive fluid fromthe ends of the cylinder into the recess 15. Packing rings 21 are alsopositioned in grooves formed adjacent the ends of the tubular members 1Sto prevent the leakage of the motive fluid from the tubular extensions13.

A shaft 22 is rotatably mounted in the tubular members 13 and issupported at one end in a bearing member 23 carried by one end of thebase rllhe shaft is prevented from moving longitudinally with relationto the cylinder by a fly wheel 2-1 and collar 25, which are fastened tosaid shaft upon opposite sides of the bearing member 23.

The portion of the shaft 22 which is disposed within t-he cylinder 6 andtubular eX- tensions. 13y is formed with oppositely pitched spiralgrooves 26 and 27.

'A pair of sleeves 23 and 29 are rotatably mounted in the adjacent endsof the tubular members 18 and the sleeve 28 is formed with internalscrew threads liitted in the spiral groove 26 in the shaft 22, while theother sleeve 29 is formed with internal screw threads itted within theother spiral groove 27.y v

The adjacent ends of the sleeves 28 and 29 are formed with flanges 30and 31, in which are forme-d oppositely directed ratchet teeth. Asubstantially triangular double-toothed pawl 32 is pivotally secured at33 in a. recess formed in the enlargement or housing 17, and is adaptedto alternately engage the ratchet teeth of the flanges 30 and 31, duringreciprocation of theV piston 14 within the cylinder. By reference toFig. 1 it will be observed that the housing 17 is movable a limiteddistance within the recess 15 in the piston and as said housingfrictionally engages the wall of the bore of the cylinder it is evidentthat during direction the sleeve 28 reciprocation of the piston thehousin'g'will be shifted from one to the other end of the recess 15. Themedial Yportion -of the bar or web 16 of the piston is formed with avertical extension 36 of the pawl 32, whereby the latter is alternatelyengaged with the ratchet teeth of the two anges 30 and 31 during,movement of the housing 17 with relation to the piston 14;

Themedial portion or the cylinder 6- is Lformed with diametricallyopposed inlet and'exhaust ports 37 and 38, respectively. v1n operatiomthe 'compressed mixture at theleft VVend of the cylinder, in Fig. 1, is

ignited bythe spark plug 12 and the consequent expansion of the mixtureeects a longitudinal movement of the piston let toward the right handend of the cylinder, vthe housing v12'VV being simultaneously movedagainst the left hand wall of the recess 15 in the piston, causing thepawl 32 to lock the sleeve 2S against rotation, and thus as the pistonmoves the sleeve 28 is held against rotation and the screw threadsthereof workn ing in the groove 26 in the shaft 22 rotate the latterinet-lie direction of the arrow in Fig. 1; As the piston 14 passes theexhaust port 38f'the yproducts of combustion are exhausted ytherethroughand as the piston approaches the right hand end of the cylinder themixture in that end is compressed and subsequently ignited by the sparkplug 12, the coincident explosion effecting a leftward movement of thepiston and causing the housing 17 to be moved againsty the righthandwall of therecess 15 in the piston 14, thus swinging, the pawl 32 'uponyits-.pivotal'axis 33 and engaging it withY the ratchet teeth of thesleeve 29, whereby the latteris locked against rotary movement andtheinternal screw threads ofthat sleeve operate to rotate the shaft-22. Itwillbe understood that during the movement of the piston 14 toward y'theright the sleeve 29 is released from, the pawl 32'and may freely rotate,while, as the piston moves in the opposite is released vfrom the pawlV372 and may alsofreely rotate; 4

AlthoughY I have shownthe invention embodied in an engine of theinternal combustion type, it Vwill be understood that the principles ofconstruction may be embodied in other engines operated by fluidpressure.l/Vhat l claim is: v t 1.1n an engine, a cylinder, a piston reciprocablymounted therein, an engine shaft extending through the piston anddisposed eccentrically thereto, and means for transmitting movement ofthe piston to the shaft. 2. In an engine, a cylinder, a pistonreciprocably mounted therein, a tubular member projecting eccentricallyfrom the piston and slidably received in the head of the vertical slot34, through which is secured a ciprocably mounted therein,

pin 35 received within a slot formed in-aM cylinder, a shaft rotatablysupported in the tubular member, and means for transmitting movement ofthe piston to the shaft.

3. 1n an engine, a cylinder, a piston re a shaft having avspiral groovetherein, means carried by the piston and engaging in the .groove ytotransmit rotary movement to the shaft during reciprocatory movement ofthe piston,

and means having sliding contact with the c wall of the cylinder toautomatically yshift' the piston carried means,y

4. An engine including ton reciprocably mounted therein, a shaft havingoppositely pitcher spiral grooves therein, internally screw Ythreadedsleeves fitted upon the grooved shaft and movable with the pistonwhereby rotary movementv is imparted to the shaft during reciprocationof the piston, and means contacting the cylinder wall to alternately4lock the sleeves against rotation. L

5. An engine including a cylinder, a piston reciprecably mountedtherein, a sha t having oppositely pitched spiral grooves therein,internally screw threaded sleeves tted upon said shaft and movable withthe piston, means to alternately lock the sleeves against rotation, andmeans operable by contact with the cylinder Iwall to autoA inaticallyactuate the reciprocation of movement of the shaft in one direction. f

locking means during 6. An engine including a cylinder having tubularextensions connected therewith, a

piston reciprocably mounted in said cylinderhaving a recess therein, ahousing movably positioned in said recess and engagingthe wall of thebore of the cylinder whereby the position of the housing is tion to thepiston during reciprocationof the latter, tubularv members connectedwith said housing and extending into theextensions, a shaft rotatablysupported in said tubular members and having Y pitched spiral groovestherein, screw threa del sleeves fitting in thegrooves of the shaft androtatably received within the housing, andineans controlled by 'saidhousing for alternately locking the sleeves against. rotary movement toveffect rotary. movement of the shaft in one Vdirection duringreciprccation of the piston.l i f 7 In an engine, acylinder, tubularextensions projecting outwardly of the opposed ends of the cylinder anddisposedec'- centrically with relation to theaxis of the latter, apiston reciprocablymounted in the cylinder, a shaft mounted in thepiston and arranged within the extensions, a tubular member disposedeccentric to the axis of and connected with the piston, extending intothe extensions and rotatably receiving the shaft, and means fortransmitting movement of the piston to the shaft.

Va cylinder, a pis-v the piston to effect'` rotary shifted withl rela`oppositely internally.

iso

8. In an engine, a cylinder, a piston reeiproeably mounted therein, ashalit extending through the piston and cylinder and having eppositelypitched spiral grooves therein, internally sereiv threaded sleevesfitted in the shaft and movable with the piston, and a single paivlpivotally supported in the piston and Capable of alternately looking thesleeves against rotation.

9. An engine including a cylinder, a piston reeiproeably mount-edtherein, a shaft extending through the piston and cylinder and havingoppositely pitched spiral grooves therein, internally screw threadedsleeves iitted upon the shaft and movable With the piston, a paivl foralternately locking the sleeves against rotation, and means havingsliding contaetivith the ivall of the cylinder for automaticallyshifting the pawl.

l0. An engine including a cylinder, a piston reoiproeably mountedtherein, a shaft extending through the piston and cylinder, said pistonhaving a diametrieal recess, a tubular member engaged with the pistonand movable longitudinally With relation thereto, an enlargement on thetubular member having sliding contact with the Wall of the Cylinder,said shaft having oppositely pitched spiral grooves therein, internallyscrew threaded sleeves fitted upon said shaft, and means controlled bysaid enlargement for alternately looking the sleeves against rotation.

In testimony whereof I affix my signature in presence ot' tivoWitnesses.

AXEL V. RASMUSSEN.

IVitnesses EDWIN HERZOG, M. J. FEAMLEY.

Gopes of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents.Y Washington, D. C.

